Nayar Power Controls Pvt. Ltd. Offers Automatic Servo Voltage Corrector. Nayar Power Controls Pvt. Ltd. Is an ISO 9001:2008 awarded company. The company manufactures Quality Control Systems like UPR - Uninterruptible Power Supply, Inverters, Transformers, Automatic Line Voltage Correctors, and AC Synchronous Motor etc. The Automatic Servo Voltage Corrector incorporate a unique solid state sensing circuit , relays and a heavy duty transformers to give long and trouble free service. The Automatic Servo Voltage Corrector comes with a volt meter and switches are mounted to indicate the Input / Output voltage by pressing a switch.